mxverify / opus 5.1

Sites where “opus 5.1” is a top search keyword

2 sites on record list “opus 5.1” among the searches that send them the most visitors, by traffic estimates. It is searched about 49.5K times a month on Google, worldwide (Google Ads, Sept 2026), at about $1.57 a click in search ads: a month of its searches would cost about $77.7K as search ads. Each site checked on the backlink value checker adds its top five search keywords, so this list grows as sites are checked.

Keyword intelligence

49.5KGoogle monthly search volume×291 since Oct 2025

×131Last 3 months vs 3 beforerising

76/100Demand scorestrong

41/100Keyword difficulty (US)possible

InformationalSearch intentwants to learn

$1.57Google Ads cost per clicktop-of-page bids $0.44–$4.00

65.9KThird-party estimated keyword demandSept 2026

2Sites getting visits from itSept 2026

What the data says

Demand is rising: Google searches for “opus 5.1” multiplied about 291 times (170 to 49.5K) from Oct 2025 to Sept 2026; the last three months averaged 24.1K, about 131 times the three before.
The 2 listed sites take about 2,020 visits a month from “opus 5.1”, 3% of its 65.9K searches (traffic estimates). The other 97% goes to sites not on record here, or ends without a click.
rfc-editor.org takes 58% of the listed sites' visits from “opus 5.1”: one site holds most of this keyword's traffic.
At $1.57 a click (Google Ads), the listed sites' 2,020 visits a month from “opus 5.1” would cost about $3,171 as search ads; rfc-editor.org's alone about $1,853. That is what the traffic would cost to buy, not what it earns.

1Demand

Search demand, month by month

Google monthly search volume (Google Ads, worldwide)Third-party estimated keyword demand

Every month's figures

	Oct 2025	Nov 2025	Dec 2025	Jan 2026	Feb 2026	Mar 2026	Apr 2026	May 2026	Jun 2026	Jul 2026	Aug 2026	Sept 2026
Google monthly search volume (Google Ads, worldwide)	170	260	390	320	260	210	210	170	170	590	22.2K	49.5K
Third-party estimated keyword demand	—	—	—	—	—	—	—	—	—	—	—	65.9K

Google monthly search volume: Google Ads, worldwide, read 1 Nov 2026. Third-party estimated keyword demand is a separate source, on the same axis: the two can differ.

2Who gets the traffic

Share of the visits, Sept 2026

Site	Share	Visits	As ads	DR	Linking sites
rfc-editor.org	58%	1,180	$1,853	91	45.1K
ietf.org	42%	840	$1,319	93	121.5K

Each site's latest estimate of its visits from this keyword; “As ads”: those visits at its cost per click, what they would cost to buy; DR: Ahrefs Domain Rating; linking sites: sites linking to it (third-party link index). The sites getting its visits range from DR 91 to 93.

Where these sites' visitors are

United States21%
Russia8%
China7%
India6%
Germany6%
Other countries52%

The listed sites' own visitors by country (all their traffic), weighted by each site's visits from this keyword: their audience, not where the keyword is searched.

Phones and computers

Phones56%
Computers and tablets44%

Page loads of the listed sites by Chrome users (Chrome UX Report), weighted by each site's visits from this keyword: a site's device mix, not the keyword's. No source gives a keyword's device split.

3Ranking competition

41/100Keyword difficulty (US)possible

34/100Ranking easehard

DR 92First page, median Ahrefs DR

151Linking sites per top-ten pageaverage, US

On Google's page:AI OverviewPeople also ask

Google's first page, United States

#	Site	Page title	DR
1	anthropic.com	Introducing Claude Opus 5.5	92
2	platform.claude.com	Claude Opus 5 - Claude Platform Docs	92
3	reddit.com	Opus 5.1	95
4	reddit.com	Fable 5.1 is Opus 5.1 : r/ClaudeCode	95
5	endorlabs.com	Opus 5.5: 6x cheaper and 2x faster than Fable 5.1, but only ...	74
6	youtube.com	Claude Opus 5.5 Just Killed Fable 5.1! (and GPT-6 Astra)	99
7	cometapi.com	Claude Opus 5.1: Release Status & What to Use Now	64
8	myclaw.ai	Fable 5.1 vs Opus 5: Which Claude Should You Run?	51

Google's results for “opus 5.1” in the United States, in English, read 1 Nov 2026. DR: Ahrefs Domain Rating; “—”: Ahrefs gives no rating.

Keyword difficulty is 41 of 100 for US results: possible on the vendor's scale.
reddit.com has 2 results in Google's top 8 for “opus 5.1”.
None of the 2 sites listed here is in Google's US top 8 for “opus 5.1”.
The first page's median Ahrefs DR is 92; the lowest-rated result, myclaw.ai at #8, has DR 51.
The top ten pages have about 151 linking sites each on average (US results, third-party link index).
Google shows an AI Overview for “opus 5.1”, citing 3 sites: it sits above the results and takes clicks from them.

4Intent and related searches

Informational: wants to learn
The searcher's goal, as a third-party keyword database classifies it (US).

Questions people ask

Is Opus 5 a good model?
Does Opus 5 cost money?
Is Opus 5 as good as Fable?
Is opus 5.5 cheaper than opus 5?

Keywords the same sites get visits from

rfc 2 of these sites · 2 sites in all
web proxy 1 of these sites · 2 sites in all
ietf 1 of these sites · 1 site in all
olxc 1 of these sites · 1 site in all
rfc 6749 1 of these sites · 1 site in all
rfc 7807 1 of these sites · 1 site in all
rtp 1 of these sites · 1 site in all

Keywords the listed sites also get visits from, the most shared first: linked by the same sites' traffic, not by meaning.

5Opportunity

76/100 · Demand score, strong

How much searching there is and what advertisers pay for it.

Searches	74	49.5K a month · weight 40%
Year	100	×291 since Oct 2025 · weight 20%
Momentum	100	last 3 months +13044% on the 3 before · weight 20%
Commercial	31	$1.57 a click (Google Ads) · weight 20%

34/100 · Ranking ease, hard

How open Google's first page is: 100 minus its difficulty and strength.

Keyword difficulty	59	41 of 100 (US) · weight 50%
First-page strength	8	median Ahrefs DR 92 · weight 50%

What to do with it

Strong demand but a hard first page (ease 34): aim at its related searches first and build links before the head term.
Study rfc-editor.org: it takes 58% of the listed sites' visits from “opus 5.1”; its report shows which of its traffic comes from search.
Google answers part of it in an AI Overview: the pages it cites get a link above the results.
The listed sites take 3% of its searches: most of the traffic goes to sites not on record here.

A business score needs your own figures (conversion, deal value) and is not made here. Scores are fixed formulas over the figures shown; they are not Google's.

6Sources

Google monthly search volume, Google Ads cost per click, bids and paid competition: Google Ads, worldwide, read 1 Nov 2026.
Third-party estimated keyword demand, cost per click and each site's visits (est.): third-party traffic estimates, Sept 2026.
Keyword difficulty, intent, SERP features, top-ten links: a third-party keyword database, United States, read 1 Nov 2026.
Google's first page, AI Overview, related searches: Google search, United States, read 1 Nov 2026.
DR: Ahrefs Domain Rating. Linking sites: a third-party link index.
Phones and computers: Chrome UX Report.

Tiles, findings, scores and actions are worked out from the figures on this page by fixed rules.

Site	Report	Visits (est.)	Month
ietf.org	Audited	840	Sept 2026
rfc-editor.org	Audited	1,180	Sept 2026

Listed A–Z. A top search keyword is one of the searches that bring a site the most visitors, by estimate. It is not a position in Google, and the order here is not a ranking. Visits (est.): the traffic estimate's own figure for the keyword on that site, which behaves like visits a month, not an amount of money (2026-09-29: it had been shown in dollars). Ad value is what advertisers pay for the keyword — its searches × cost per click — not how hard it is to rank for. This page is kept out of search results until 15 sites share the keyword.

Searches, cost per click and ad value above: Google Ads, worldwide. Sites and their visits: third-party traffic estimates, Sept 2026. The traffic estimates' own searches figure for the keyword is in the section below; the two sources often differ several times over.